Psoriasis is a common skin disease. About 2% of the world’s population will develop psoriasis at some point in their lives.
In this article, professor of dermatology and skin scientist Mary L. Williams, M.D. discusses the recent research that shows that psoriasis develops due to the interplay between a vulnerable epidermis, the outer layer of the skin which often has a genetically-inherited tendency towards developing psoriasis, and a dysregulated immune system which creates inflammation of the epidermis. Restoring the health of the skin barrier and turning off proinflammatory signals sometimes by covering the psoriasis outbreak with repeated layers of petroleum jelly may be all that’s needed to help it heal.